build: update to latest gnulib
build: update to latest gnulib

In particular, this is a quick gnulib fix for a mingw compile error.

* .gnulib: Update to latest.

Signed-off-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,eskultety/libvirt,crobinso/libvirt,andreabolognani/libvirt,libvirt/libvirt,VenkatDatta/libvirt,zippy2/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,eskultety/libvirt,libvirt/libvirt,andreabolognani/libvirt,taget/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,taget/libvirt,VenkatDatta/libvirt,datto/libvirt,olafhering/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt,eskultety/libvirt,jardasgit/libvirt,crobinso/libvirt,eskultety/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,datto/libvirt,olafhering/libvirt,fabianfreyer/libvirt,olafhering/libvirt,taget/libvirt,jfehlig/libvirt,andreabolognani/libvirt,datto/libvirt,jardasgit/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,zippy2/libvirt,taget/libvirt,fabianfreyer/libvirt,crobinso/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,datto/libvirt,zippy2/libvirt,taget/libvirt,jardasgit/libvirt,andreabolognani/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,crobinso/libvirt,andreabolognani/libvirt,eskultety/libvirt,datto/libvirt